Velopedia Bicycle Archive

2010 Rocky Mountain Oxygen 50 AC

Original specifications: Shimano 105 · 10-speed rear derailleur · 700c wheels.

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At a glance

Archive #21318

Model year: 2010
Category: Road
Sizes: 48cm, 51cm, 54cm, 57cm, 60cm
Colors: Cilver/Black
In this record: 25 specifications

Model history 1 other year

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Identification clues

2010 archived details

Published colors: Cilver/Black
Frame: 7005 triple butted aluminum w/Delta Process TT & carbon seatstays
Original equipment: Shimano 105 Mix

Clues, not proof of model year. Colors vary and components may have been replaced.

Original build7005 triple butted aluminum w/Delta Process TT & carbon seatstays · Shimano 105 Mix · 700c wheels

Historical catalog variants

Archived sizes and colors

5 item records

Item-level catalog entries recovered from Velopedia’s original bicycle archive. They document how this model was listed historically; they do not identify the frame size associated with legacy reference geometry or indicate current availability.

Published sizes

48cm51cm54cm57cm60cm

Published colors

Cilver/Black

View 5 archived size/color combinations

Size	Color
48cm	Cilver/Black
51cm	Cilver/Black
54cm	Cilver/Black
57cm	Cilver/Black
60cm	Cilver/Black

Historical catalog evidence. Exact specifications and naming may vary by market, production run or manufacturer revision.

Frameset

Frame Construction	TIG-welded/bonded
Frame Material	7005 triple butted aluminum w/Delta Process TT & carbon seatstays
Fork Material	Carbon w/alloy steerer

Drivetrain

Component Group	Shimano 105 Mix
Shifters	Shimano 105 STI
Front Derailleur	Shimano 105, clamp on 34.9mm
Rear Derailleur	Shimano 105
Crankset	FSA Gossamer, 34/50 teeth
Bottom Bracket	FSA Mega EXO
Cassette	Shimano 105
Rear Cogs	10-speed, 12 - 27 teeth
Chain	Shimano 105
Pedals	Not included

Brakes

Brakes	Tektro R530 Dual-Pivot brakes, Shimano 105 STI levers

Cockpit & Contact Points

Headset	FSA Orbit CS
Handlebar	FSA Wing Compact
Handlebar Extensions	Not included
Stem	RMB flip/flop 31.8mm
Saddle	Rocky Mountain Road
Seatpost	RMB, 31.6mm diameter

Wheels & Tires

Hubs	Fulcrum Racing 7
Rims	Fulcrum Racing 7
Spokes	Fulcrum, Wheelset
Front Tire	700 x 25c Vittoria Zaffiro
Wheel Size	700c wheels

Gearing

Lower gears help on climbs. Higher gears suit higher speeds.

Pedal cadence

RPM

Speed units

RPM = pedal turns per minute.

All published sizes50/34T · 12–27T · 10-speed

Lowest1.26:1 Highest4.17:1 Total range331%

Estimated speed At 90 RPM Lowest gear8.9 mph Highest gear29.5 mph

Uses front tire 700C×25; rear size isn’t listed.

How it works

Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.

Speeds are estimates from tire size and pedal cadence. Actual speeds vary.

Try other gearing

Try your current gearingChanged tires or gears? Calculate your setup.

Your changes apply to this calculation. The archived build stays unchanged.

Gears Drivetrain

Front teeth Smallest rear teeth Largest rear teeth

Use up to three front tooth counts, separated by /. For one rear sprocket, enter the same count twice.

Rear tire

Rear tire marking

Apply the marking on your rear tire or edit its dimensions below. Older or fractional inch sizes need the ISO marking (e.g. 37-590).

Rim diameter (BSD, mm) Tire width (mm)

For 32-622, width is 32 mm and rim diameter is 622 mm. Use the rear tire on mixed-wheel bikes. Leave both fields empty to compare ratios only.

Cadence (RPM) Speed units

Gear, dimension and cadence changes update results automatically.

Gearing comparison
Measure	Original	Your setup
Lowest ratio	—	—
Highest ratio	—	—
Total range	—	—
Lowest-gear speed	—	—
Highest-gear speed	—	—

Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.

Parts & serviceability

Find replacement parts

Original specifications

Front tire · Original

700 x 25c Vittoria Zaffiro

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Retailer offers

Vittoria Zaffiro Pro V Clincher Tire Black, 700x25

700x25c

Model match

Competitive Cyclist ↗$31.21

Other replacement options (1)

Vittoria Zaffiro EVO V G2.0 Tire Tan, 700x25

700x25c

Model match

Competitive Cyclist ↗$48.99

Seatpost · Original

RMB

31.6mm diameter

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Retailer offers

FSA Gossamer SB20 Seatpost Black, 31.6mm, 350mm

Replacement option

Competitive Cyclist ↗$36.75

Backcountry ↗$36.75

Chain · Original

Shimano 105

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More parts (10)Fewer parts

Brake pads · Original

Tektro R530 Dual-Pivot brakes

Shimano 105 STI levers

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Bottom bracket · Original

FSA Mega EXO

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Crankset · Original

FSA Gossamer

34/50 teeth

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Front derailleur · Original

Shimano 105

clamp on 34.9mm

Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.

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Rear derailleur · Original

Shimano 105 Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.

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Shifters · Original

Shimano 105 STI Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.

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Handlebar · Original

FSA Wing Compact

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Headset · Original

FSA Orbit CS

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Rims · Original

Fulcrum Racing 7

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Hubs · Original

Fulcrum Racing 7

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Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.

Parts and service referenceQuick reference before buying parts

Archived specifications for reference. Check the fitted parts before ordering.

Front tire: 700 x 25c Vittoria Zaffiro
Drivetrain: 10-speed
Seatpost diameter: 31.6 mm
Bottom bracket / shell: FSA Mega EXO

Equipment inspection checks 9 checks based on 5 archived component groups Open equipment checksClose equipment checks

Checks selected from the archived equipment. Confirm what is fitted today. This is not a complete safety inspection; use the full inspection guide before test riding.

Full used-bike inspection guide →

Frame and fork

Inspect the frame and fork →

Archived: Frame: TIG-welded/bonded · Fork: · Carbon w/alloy steerer

Inspect composite areas in bright light for impact marks, cracks, ripples or crushed clamp zones. Check metal sections and welds separately for dents or cracking.

Drivetrain

Check drivetrain wear →

Archived: Group: Shimano 105 Mix · Shifters: Shimano 105 STI · Front derailleur: Shimano 105, clamp on 34.9mm · Rear derailleur: Shimano 105 · Crankset: FSA Gossamer, 34/50 teeth · Bottom bracket: FSA Mega EXO · Cassette: Shimano 105 · Rear cogs: 10-speed, 12 - 27 teeth · Chain: Shimano 105

Shift through every available gear under light load. Hesitation, skipping or inconsistent indexing can reflect wear, damage, poor adjustment or mismatched replacement parts.
Measure chain wear with a compatible gauge and inspect chainring, cassette or freewheel teeth. A new chain does not rule out wear in the remaining drivetrain.
Turn the cranks slowly, feel for rough bearings and check for side-to-side play. Inspect crank arms, chainring bolts and pedal threads for looseness or damage.

Brakes

Inspect the brakes →

Archived: Brakes: Tektro R530 Dual-Pivot brakes, Shimano 105 STI levers

Inspect pads and braking surfaces, check the complete cable or hose path, and confirm both controls feel consistent and return cleanly.

Wheels and tires

Check wheels and tires →

Archived: Wheel size: 700c wheels · Rims: Fulcrum Racing 7 · Hubs: Fulcrum Racing 7 · Front tire: 700 x 25c Vittoria Zaffiro

Spin both wheels and watch for side-to-side and vertical movement. Check spoke tension, rim condition and hub play.
Inspect both tire casings for cuts, cracking, plugs, bulges or exposed threads and confirm the installed sizes are safe for the rims and available frame and fork clearance.

Controls and contact points

Archived: Headset: FSA Orbit CS · Handlebar: FSA Wing Compact · Stem: RMB flip/flop 31.8mm · Seatpost: RMB, 31.6mm diameter · Saddle: Rocky Mountain Road · Pedals: Not included

Apply the front brake and rock the bike to check for headset play or notchiness. Inspect the stem, handlebar and clamp zones, then confirm every fastener and control is secure.
Check that the seatpost moves for adjustment and that the saddle, post and clamp hold securely without cracks, severe corrosion or damaged hardware.

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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

2010 Rocky Mountain Oxygen 50 AC